git is a very sophisticated tool with a lot of amazing options. Although you really only need to use a few of the git commands to do most of your work, it can feel a bit overwhelming at first.
Also, it would be a good idea if at least one person on each team agrees to become the "git specialist" -- someone who digs deeper so that they understand more of the powerful features that git provides, and can help their team out when they have git-related problems.
So - what resources can you find? The best web tutorials? YouTube Videos? Free books? Cheat sheets?